Birmingham police are investigating the death of Ashton Stringer-Jones, 7 months, from injuries suffered while his mother attended a college class. (Special)

The Friday death of a 7-month-old Birmingham boy is being investigated as a homicide, authorities said today.

Ashton Stringer-Jones was pronounced dead at Children's Hospital Friday morning, two days after he arrived there unresponsive. Jefferson County Chief Deputy Coroner Pat Curry said today Ashton died from blunt force trauma to the head.

Authorities said the baby's mother, a 22-year-old Miles College student, left Ashton in the care of a friend Wednesday morning to attend class. When she returned to pick up her son, he was wrapped in a blanket and she was told he was asleep.

The mother realized he was unresponsive and called an ambulance. Ashton was pronounced dead at 10:15 a.m. Friday. Birmingham police are investigating the slaying.